参加过各种 online judge 的同学肯定知道，一般每道编程题都会有运算时间限制和内存限制。在python中，我们可以使用resource模块来实现。
限制cpu时间
import signal
import resource
import os
def time_excedded(signo, frame):
print "time's up"
raise SystemExit(1)
def set_max_runtime(seconds):
soft, hard = resource.getrlimit(resource.RLIMIT_CPU)
resource.setrlimit(resource.RLIMIT_CPU, (seconds, hard))
signal.signal(signal.SIGXCPU, time_excedded)
if __name__ == "__main__":
set_max_runtime(15)
while True:
pass
限制内存
def limit_memory(maxsize):
soft, hard = resource.getrlimit(resource.RLIMIT_AS)
resource.setrlimit(resource.RLIMIT_AS, (maxsize, hard))
